Synergistic influence of iodide ions on the inhibition of corrosion of C-steel in sulphuric acid by some aliphatic amines

Fouda, A. S.; Mostafa, H. A.; El-Taib, F.; Elewady, G. Y.

doi:10.1016/j.corsci.2004.09.008

Cited by 137 publications

(58 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 10 and corrosion inhibition is found to increase with increase in concentration of inhibitors S1, S2 and S3. It is evident from the Tables that iodide ions enhance the inhibition of the three inhibitors 27,28 .When I -ions are added to the inhibiting solution, they are chemisorbed by forming chemical bonds on the positively charged steel surface in 1M H 2 SO 4. This strong chemisorptions of I -ion shifts the metal to a more positive potential and enhances inhibitor property.…”

Section: Electrochemical Studies Ac Impedance Measurements and Potenmentioning

confidence: 99%

Study of Corrosion Inhibition Properties of Novel Semicarbazones on Mild Steel in Acidic Solutions

Govindasamy

Ayappan

2015

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The inhibition efficiency of corrosion on mild steel using acids by three different novel Semicarbazones as inhibitors have been studied using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy methods. The inhibition efficiency, corrosion rate, the nature of anchoring sites and the adsorption characteristics have been determined from the results. It was found that the newly synthesized compounds behaved as mixed type inhibitors with high inhibition efficiency. The inhibition efficiency increases with increasing the inhibitors concentration but decreases with increasing the temperature. Addition of halide ion enhances the inhibition efficiency. The adsorption of the inhibitors on the mild steel surface obey Langmuir adsorption isotherm.Scanning Electron Spectroscopy is used to examine the surface morphology of mild steel samples both in the presence and absence of inhibitors at optimum conditions. Scanning Electron Microscope reveals the formation of a smooth, dense protective layer in the presence of inhibitor.

show abstract

Section: Electrochemical Studies Ac Impedance Measurements and Potenmentioning

confidence: 99%

Study of Corrosion Inhibition Properties of Novel Semicarbazones on Mild Steel in Acidic Solutions

Govindasamy

Ayappan

2015

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Log k o r % I = -ρ σ [ 7 ] where, ρ is the reaction constant. Those substituents which attract electrons from the reaction center are assigned positive σ values and those which are electron donating have negative σ values.…”

Section: Chemical Structure and Corrosion Inhibitionmentioning

confidence: 99%

“…A number of studies have recently appeared in the literature [6][7][8][9][10] on the topic of the corrosion inhibition of Csteel in acidic media. But little work appears to have been done on the corrosion inhibition of steel alloys in sulphuric acid using thiazole derivatives.…”

Section: Introductionmentioning

confidence: 99%

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

2010

View full text Add to dashboard Cite

KEYWORDS5-phenylazo-2-thioxo-thiazolidin-4-one and four of its derivatives have been investigated as corrosion inhibitors for C-steel in 1 M sulphuric acid solution using weight-loss and galvanostatic polarization techniques. The efficiency of the inhibitors increases with increase in inhibitor concentration but decreases with a rise in temperature. The conjoint effect of the thiazole derivatives and KBr, KSCN and KI has also been studied. The apparent activation energy (Ea*) and other thermodynamic parameters (ΔS*, ΔH* and ΔG*ads) for the corrosion process have also been calculated. The galvanostatic polarization data indicated that, the inhibitors were of mixed-type, but the cathode is more polarized than the anode. The slopes of the cathodic and anodic Tafel lines (ßc and ßa) are approximately constant and independent of the inhibitor concentration. The adsorption of these compounds on C-steel surface has been found to obey the Temkin's adsorption isotherm. The mechanism of inhibition was discussed in the light of the chemical structure of the undertaken inhibitors.Corrosion inhibitors C-steel Weight loss Synergistic effect Polarization Thiazole derivatives

show abstract

“…Environmentally friendly organic inhibitors containing heteroatoms N, O, and S in the molecules were reported to be effective inhibitors for metals and al alloys in an environment containing aggressive ions [4,5]. There are many studies deal with the corrosion inhibition effects of these organic compounds in acidic solutions, especially in the treatment of steel and ferrous alloys in hydrochloric or sulphuric acid [6][7][8]. However, very little literature is reported on the corrosion protection of carbon steel in neutral chloride medium, which leads to extensive general and localized pitting corrosion of carbon steel [9,10].…”

Section: Introductionmentioning

confidence: 99%

Inhibitive effect of N,N'-Dimethylaminoethanol on carbon steel corrosion in neutral sodium chloride solution, at different temperatures

et al. 2018

View full text Add to dashboard Cite

Abstract. The inhibition of carbon steel corrosion in neutral sodium chloride solution by N,N'-Dimethylaminoethanol (DMEA), at different temperatures, was investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results obtained confirm that DMEA is a good organic corrosion inhibitor for carbon steel in 0.5M of NaCl (concentration encountered in the Mediterranean seawater), over the whole range of temperatures studied. The inhibition efficiency (IE%) increases with increasing DMEA concentration; it reaches highest value for a concentration around 0.125 mol.L -1 . Potentiodynamic polarization data show that, the compound studied in this research predominantly act as anodic-type inhibitor. The EIS study reveals that the addition of DMEA decreases the corrosion rate of carbon steel in neutral sodium chloride solution, due to the fact that the inhibitor molecules are strongly adsorbed on the active sites following Langmuir isotherm, thus leading to the formation of a stable protective film on the steel surface which is able to keep the metal/solution interface in a passive state. Furthermore, the values of the activation parameters, i.e. ΔHa and Ea obtained in this study indicate that the adsorption process of DMEA is endothermic and could be mainly attributed to chemisorption, respectively.

show abstract

Synergistic influence of iodide ions on the inhibition of corrosion of C-steel in sulphuric acid by some aliphatic amines

Cited by 137 publications

References 29 publications

Study of Corrosion Inhibition Properties of Novel Semicarbazones on Mild Steel in Acidic Solutions

Study of Corrosion Inhibition Properties of Novel Semicarbazones on Mild Steel in Acidic Solutions

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

Inhibitive effect of N,N'-Dimethylaminoethanol on carbon steel corrosion in neutral sodium chloride solution, at different temperatures

Contact Info

Product

Resources

About